Fig. 1.

Representative MRN findings in GCS. The ulnar nerve branch (encircled in yellow), the deep motor (encircled in red), and the superficial sensory branch (encircled in green) show an intermediate signal in a representative healthy control on T2w sequences with fat saturation. While the deep motor branch showed an isolated marked increase in nerve T2w signal in a patient with pure motor GCS (red arrow), the superficial sensory branch is depicted with a normal intermediate signal (green arrow). In a patient with combined motor and sensory GCS, both the deep motor and the superficial sensory branch present with a T2w signal increase. Results of this study have proven that MRN can reliably determine an exsisting neuropathy with high diagnostic accuracy even at level of the small distal nerve branches that are at the limit of current structural resolution. From Kollmer et al. [32] under the Creative Commons Attribution license